Otherwise the stamps for x86-64 and i686 uninative tarballs match
and we can't deploy both to the DEPLOYDIR.
(From OE-Core rev: 2a9603759fe87d6326c145f6213ffffeb6afc6ae)
Signed-off-by: Joshua Lock <joshua.g.lock@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>